LARVAL HABITS OF THE TIGER BEETLES. 



173 



Table III, — Showino- the characters of the third stages. 



The lengths o£ the piipse of the species herein considered are as follows : — 



PurpiLvea, 'puT'purea var. limhalis, and sexguttata, 11—12 mm. ; 12-guttata, 

 12-guttatayar. repanda, 10—11 mm. ; JiirticoUis, 11—1.3 mm. ; lepida, 9—10 mm. ; 

 punctulata, 8-9 mm. ; tranquebariea and formosa var. generosa, 14-16 mm. 

 The pupa of cuprascens is miknown. 



The first stages are much more nearly alike than the second and third. 

 Some of the species add many more bristles in the last two stages than others. 

 In spite of the general resemblance of the patterns of the different larval 

 stages, the species fall into groups entirely different from those that have 

 been made on the basis of adult characters. On the basis of the distribution 

 of bristles in the adults, the species considered fall into the following- 

 groups : — Head and prothorax pilose — generosa, purpurea, 12-guttata, tran- 

 quebariea, hirticollis, scutellaris, , cuprascens, and lepida. Head bald, 



pronotum pilose on the sides only — sexguttata and punctulata. Yet the larval 

 pilosity of the last two species is very near that o^ purpurea, tranquebariea, 

 etc. While, as has been already stated, some taxonomists have placed 

 C. purpurea and C. sexguttata in the same group, C. lepida and C. scutellaris 

 have never been regarded as in any way related. The larvae do not, however, 

 differ so strikingly as do the adults. 



